Comparison

Post Quantum Secure Chat vs PGP Messenger

Price, ratings, monetisation and update history for both apps, side by side โ€” with what reviewers say about each.

Head to head
About

Post Quantum Secure Chat

Features
Read full description

Secure messaging for the quantum era. PQC Chat is the first consumer messaging app built with NIST-standardized post-quantum cryptography. While traditional encryption may be vulnerable to future quantum computers, PQC Chat uses ML-KEM-768 and ML-DSA-44 algorithms to ensure your private conversations remain private โ€” today and tomorrow. Why Post-Quantum Security Matters Quantum computers pose a real threat to current encryption standards. Data encrypted today could be stored and decrypted later when quantum computers become powerful enough. PQC Chat protects you against this "harvest now, decrypt later" threat. Key Features โ€ข True End-to-End Encryption โ€” Messages are encrypted on your device and can only be read by the intended recipient. Not even we can access your conversations. โ€ข NIST-Approved Algorithms โ€” Built with ML-KEM-768 for key exchange and ML-DSA-44 for digital signatures, the same standards adopted by governments worldwide. โ€ข Secure Image Sharing โ€” Photos are encrypted before leaving your device, ensuring complete privacy for all shared media. โ€ข QR Code Contact Verification โ€” Verify contacts in person by scanning QR codes, preventing man-in-the-middle attacks. โ€ข Real-Time Messaging โ€” Instant message delivery with read receipts and typing indicators. โ€ข No Phone Number Required โ€” Create an account without sharing personal information. โ€ข Cross-Platform โ€” Message friends on any device seamlessly. Privacy by Design - No message content stored on servers - No tracking or analytics - No ads, ever - Open cryptographic standards About Post-Quantum Cryptography PQC Chat implements the Federal Information Processing Standards (FIPS) 203 and 204, published by the National Institute of Standards and Technology (NIST) in August 2024. These represent the gold standard in quantum-resistant cryptography. Protect your conversations for the future. Download PQC Chat today. Terms of Use (EULA): https://pqcnow.com/terms-of-service

About

PGP Messenger

Features
Read full description

PGP Chat is a privacy-first messenger built for secure everyday communication. Every message is protected with end-to-end encryption using OpenPGP, so only you and the intended recipient can read it.

Screenshots

Post Quantum Secure Chat4 screens
PGP Messenger4 screens

Verdict

The call

The clearest difference is in-app purchases: PGP Messenger at none against Post Quantum Secure Chat's 2. PGP Messenger also leads on update cadence (every 2 days vs every 10 days). On price, ads, device support and iOS requirement there is nothing between them.

Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. Post Quantum Secure Chat sells 2 in-app purchases, starting at $4.99 per month. PGP Messenger asks for nothing beyond the download.

UpkeepUpdate frequency

Post Quantum Secure Chat ships an update every 10 days, PGP Messenger every 2 days. The most recent releases landed on October 21, 2026 and October 15, 2026 respectively.

Scorecard2 real differences ยท 4 level
Post Quantum Secure Chat versus PGP Messenger: the parameters behind the verdict, then further details
ParameterPost Quantum Secure ChatPGP Messenger
PriceFreeFree
Update frequencyEvery 10 daysEvery 2 days โ€” better
AdsNoNo
In-app purchasesYesNo โ€” better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS13.013.0
Further details โ€” not scored
Size35 MB35 MB
Age rating4+4+
DeveloperSAYMATIK BILISIM VE TEKNOLOJI ANONIM SIRKETISandro Meier

In-app purchases

2 purchases

Post Quantum Secure Chat

Subscriptions2
  • Monthly Subscription$4.991 Month
  • Annual Subscription$29.991 Year
None

PGP Messenger

No in-app purchases

Questions

Is Post Quantum Secure Chat free?
Post Quantum Secure Chat is free to download, with in-app purchases available.
Is PGP Messenger free?
PGP Messenger is free to download, with no in-app purchases.
Do Post Quantum Secure Chat or PGP Messenger have ads?
Neither Post Quantum Secure Chat nor PGP Messenger shows ads.
Which is updated more often, Post Quantum Secure Chat or PGP Messenger?
Post Quantum Secure Chat ships an update every 10 days, and PGP Messenger every 2 days. Most recently, Post Quantum Secure Chat was updated on October 21, 2026 and PGP Messenger on October 15, 2026.

Other comparisons